Than you need a webcam out there, with a thermometer in the field of view.
I live in a big city, it could be raining frogs in one part and a happy sunny day in the other and the best thing any weather report could say to me is 'expect rain'. And if I need to go it doesn't even matter what the report says or if I have/have not an umbrella with me.
Honestly for the last decade even if I look at the weather report I look not for the current conditions (I have eyes and windows) but what would be in a couple of hours, because temperature difference between 9PM and 3AM could be pretty significant.. and it doesn't even matter in winter and summer. *shrug_emoji*